Mahle Rings Steel Napier THM-13 4.620 Bore x 1.0MM .136 RW Plain Ring Set

Mahle is known for making OE-quality engine components, and this Steel Napier ring set is no different. If you're rebuilding an engine with a 4.620 inch bore, these rings are designed to fit right and seal well. The Napier hook design on the second ring helps scrape oil down the cylinder wall, which can improve oil control and reduce blow-by, especially in engines that see a lot of use.

These rings are made from steel, offering good durability and consistent tension against the cylinder walls. The 1.0MM top ring and .136 inch oil ring width are standard dimensions for many performance and heavy-duty applications. When you're putting an engine back together, using well-made piston rings like these from Mahle helps ensure a solid seal between the piston and cylinder wall, which is crucial for compression and engine longevity.